Which of these are the correct sentences?
I had taken those medicines for two and a half years until I experienced side effects.
I had been taking those medicines for two and a half years until I experienced side effects.
I took those medicines for two and a half years until I experienced side effects.
I was taking those medicines for two and a half years until I experienced side effects.
I used to take those medicines for two and a half years until I experienced side effects.
Thanks
